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bug#23673: wrong sorting order

From: alainm
Subject: bug#23673: wrong sorting order
Date: Wed, 1 Jun 2016 17:56:14 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0

Thank you Assaf for the clarification.


On 01/06/2016 17:44, Assaf Gordon wrote:
tag 23673 notabug
close 23673

Hello Alain,

On 06/01/2016 09:16 AM, alainm wrote:
I need to perform a sort based on the first 3 indexes of a line (sort -k 1,3 -n truc.lst):

The 0 coordinates are not placed before the 2 coordinates, it looks like the spaces are ignore:

address@hidden 1src]$  sort  -k 1,3 -n truc.lst

To sort multiple numeric fields, use separate "-k" parameters, like so:

    sort -k1,1 -k2,2 -k3,3 -n truc.list

If in the future you wish to combine different ordering (e.g. numeric and alphanumeric, or some fields in reverse order),
consider specifying the order in each key instead of globally:

    sort -k1n,1 -k2nr,2 -k3n,3 truc.list

address@hidden 1src]$ sort --version
sort (GNU coreutils) 8.4

If you upgrade to coreutils version 8.6 or later, sort will accept '--debug' option, which will help you troubleshoot such cases:

    $ sort --debug -k 1,3 -n truc.lst
    sort: using ‘en_US.UTF-8’ sorting rules
    sort: key 1 is numeric and spans multiple fields

I'm marking this bug as done, but discussion can continue by replying to this thread.

 - assaf

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